Syringe.



PATENTED APR. 19, 1904.,

H. M. GUILD.

SYRINGB;

APPLICATION run we. 12, 1903.

MODEL.

UNITED STATES Patented April 19,1904.

PATENT OFFICE.

HENRY M. GUILD, OF ERIE, PENNSYLVANIA; NORMAN J. MAXWELL, EX- ECUTOR OFSAID GUILD, DECEASED, ASSIGNOR, BY 'MESNE ASSIGN- MENTS, TO CHARLES A.TYRRELL, OF NEW YORK, N. Y.

SYRINGE.

SPECIFICATION forming part of Letters Patent No. 757,654, dated April19, 1904.

Application filed 1311' 12,1903. Serial No. 169,296. (ModeL) To all whomit may concern:

Be it known that I, HENRY M. GUILD, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania,

haveinvented certain new and useful Improvements in Syringes, of whichthe following is a specification. I

The purpose of this invention is to provide improvements in the type ofsyringes especially adapted for irrigating the rectum and flushing thecolon or large intestine. This type of syringe involves a structureconsisting of a reservoir for holding the fluid to be injected, a headcarried by the said reservoir 5 and secured thereto, and aninjection-stem mounted upon the said head. Personal weight upon thereservoir is the motive power which forces the fluid into the colonwithout physical effort on the part of the user.

The invention per se relates particularly to the means for regulatingthe quantity of fluid passing through the injection -stem; and itconsists in a peculiar form of valve disposed upon the head.

5 For a full description of the invention and the merits thereof andalso to acquire a knowledge of the details of construction of the meansfor effecting the result reference is to be had to the followingdescription and drawings hereto attached.

iVhile the essential and characteristic features of the invention aresusceptible of modification, still the preferred embodiment of theinvention is illustrated in the accompanying drawings, in which- Figurel is a perspective view showing the embodiment of the invention. Fig. 2is a vertical sectional view through the head and adjacent the operatingparts. Fig. 3 is a detail perspective view of the valve-operating stem.I

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

As hereinbefore premised, the invention comprises a reservoir 1, whichconsists of a rubber bag or analogous receptacle in itspreferred form, ahead 2, secured to the reservoir 1, an injection-stem 3, mounted uponthe head, and a valve 4, also suitably disposed upon the head andadapted for regulation of the quantity of liquid passing through theinjection-stem 3.

The head 2 is of approximately conoidal 5 5 shape and is secured to thereservoir by means ofa plate 5. The injection-stem 3 is also threaded tothe head at the upper portion thereof and is held in its proper positionin the rectum by the natural restriction of the sphincter muscle. Thevalve 4 is provided with the valve-stem 6, having a knob 7 formanipulation of the valve. The valve is designed to be permanentlyattached to the head 2 and is provided with a reduced threaded 6 5 end8, and the valve is disposed in a trans verse opening 9 upon the head 2.The valvestem 6 is preferably integral with the valve 4, the twotherefore'constituting a single struc tural element. To hold the valve 4from dis- 7o placement from the head 2, the same is provided with anarcuate recess 10, and a stop 11 is threaded into the vertical opening12 upon the head 2 and adapted to interlock with the arcuate recess 10to prevent the aforesaid v displacement of the valve 4. The stop 11 maybe a screw or corresponding fastening device and besides preventinglongitudinal displacement of the valve from the transverse opening 9serves to limitthe rotary movement of the valve. The limit of rotarymovement of the valve in one direction disposes the valve with thevalve-opening 13 in registry with the duct 14, through which the fluidpasses to the injection-stem 8.

The peculiar form of stop 11 employed is advantageous in that the sameis located so as to be housed, this being of importance for many obviousreasons. The stop also is disposed so as to form a twofoldoffice-namely, as 9 means for limiting the rotary movement of the valveand for preventing longitudinal displacement thereof, thus obviating theprovision of an auxiliary or independent element for accomplishingeither of the above.

When turning the stem 6 to throw the opening of the valve 4 out ofregistry with the opening of the head 2, said valve receives a twofoldmovementone rotary, the other longitudinal-by reason of its screw-threadconnection with the head. This combined movement of the valve causes awall of the groove 10 to ride upon a side of the stop 11, and theresultant wedging or cam action compels a crowding of the matchingscrew-threads (If the parts 8 and 9, so as to prevent any possi bleleakage between the valve and head when the said valve is closed and thereservoir is subjected to pressure. c

Having thus described the invention, What is claimed as new is- 1. Incombination, a head provided with an injection-tube and an opening incommunication with said tube, a rotary valve mounted in the said headand extended across the aforesaid opening thereof and having an openingto register therewith in one position of the valve, matchingscrew-threads between the valve and head to effect a simultaneouslongitudinal movement of the valve with its rotary movement, and aninterlocking groove and stop between the head and valve to limit thecombined rotary and longitudinal movement thereof and to effect acrowding or closing of the screw-threads of the valve and head by a camor wedging action, substantially as described.

2. In a syringe, the combination of a conoiolal shaped head having alongitudinal valve-opening and a transverse opening extended into thehead from one side and intersecting the valve-opening, the inner endportion of the transverse opening being closed, threaded-and contracted,a valve having its inner end reduced and threaded to match the reducedthreaded portion of the said transverse opening and provided with anopening to register with the aforesaid valve-opening, and having theenlarged portion adjacent to the threaded part provided with acircumferential groove, and a stop titted into an opening of the headand extended into the said circumferential groove to act with a wallthereof by a cam or wedging action upon turning the valve to limit itscombined rotary and longitudinal movement and effect a closing orcrowding of the matching screw-threads between the valve and head,substantially as set forth.

In testimony whereof I affix my signature in presence of, two Witnesses.

HENRY M. GUILD.

